Definition

1. Noun:
   • The state or quality of being physically solid, firm, and dense: The condition of having a definite shape and volume, not being liquid or gaseous; the property of being hard and compact.
   • The quality of being strong, stable, and reliable: The characteristic of being sound, dependable, and well-founded in terms of finances, facts, arguments, or moral character.

Usage

• Physical State: Used to describe the physical hardness, density, or impenetrability of an object or substance.
• Abstract Quality: Used to describe the strength, reliability, or substantial nature of non-physical things like arguments, evidence, institutions, or character.

Examples

• Physical State:
  • The solidity of the ancient stone wall was impressive.
  • Engineers tested the solidity of the bridge's foundations.
• Abstract Quality:
  • Investors were reassured by the financial solidity of the company.
  • The solidity of her research made her conclusions difficult to dispute.

Advanced Usage

• "Moral solidity": Refers to the strength and reliability of a person's ethical principles.
  • He was known for his moral solidity and integrity.
• "Factual solidity": Refers to the strength and reliability of evidence or data.
  • The case was built on the factual solidity of the forensic report.

Variants and Related Words

• Solid (adj): Firm, stable, or reliable.
  • The table is made of solid oak.
• Solidify (verb): To make or become solid, firm, or reliable.
  • The mixture will solidify as it cools.
• Solidness (noun): A synonym for solidity, especially regarding reliability.
  • The solidness of the plan gave everyone confidence.

Synonyms

• Firmness: The quality of being solid and resistant to pressure.
• Stability: The state of being steady and not likely to change or fail.
• Density: The degree of compactness of a substance.
• Soundness: The quality of being based on valid reason or good judgment.

Antonyms

• Fluidity: The quality of being able to flow easily.
• Instability: The state of being unstable or not firm.
• Fragility: The quality of being easily broken or damaged.
• Insubstantiality: The quality of being weak or flimsy.

Related Phrases

• "A pillar of solidity": A person or thing that is a very strong and reliable support.
  • In times of crisis, she was a pillar of solidity for her family.
• "Test the solidity of": To check how strong or reliable something is.
  • The audit was designed to test the solidity of the bank's assets.

Noun

1. the quality of being solid and reliable financially or factually or morally
   • the solidity of the evidence worked in his favor
   • the solidness of her faith gave her enduring hope
2. state of having the interior filled with matter
3. the consistency of a solid